Armchair



FIG. 1 is a view in front elevation of an armchair showing my new design;

FIG. 2 is a side view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a plan thereof.

FIG. 5 is a perspective view thereof.

The side not shown in the drawings is a mirror image of FIG. 2. 

The ornamental design for armchair, as shown and described. 